After weeks during which Castillo had referred in trance to his American programmers as communist agents, he now began describing them as CIA operatives. Why would the CIA have wanted to eliminate Ferdinand Marcos? Arcega's analysis was that an assassination allegedly committed by one of the Huks (with whom Castillo was openly associated) would lead to a complete crackdown on communist insurgency by a new Philippine president, a man more inclined to be a CIA puppet than the independent-thinking Marcos.

Equally curious was the FBI's arrest record on Castillo, which had recently been obtained by Professor Popkin. There it was noted: "On February 2, 1967, he was deported to the Philippines from New Mexico." Yet Castillo, at that time, was traveling under a passport bearing the name of Eloriaga. And, having never been a Philippine resident, he could not have been "deported." It turned out that Antonio Reyes Eloriaga was also a real person, born in Manila on August 29, 1944. According to the Manila Times, Castillo had had specific orders to contact Eloriaga in Chicago and assume his identity, then have himself arrested and deported.

Arcega maintained that the FBI in Manila had tried through several sources to disrupt or block his interrogation, once trying to have Castillo given LSD in lieu of any more hypnosis. By then, Arcega and Castillo had established a rapport. For the initial weeks, Castillo had refused to believe he'd been hypnotized to undertake various missions—until finally, Arcega played a tape of him walking through the "zombie" state. Horrified, Castillo had broken down and asked that the sessions continue until the whole truth could be unlocked.

Arcega's efforts with Castillo were ultimately curtailed. He was told that Castillo had been beaten by another prisoner and now refused to submit to any more sessions. After late June 1967, Arcega heard no more about Castillo's fate.

At the end of that year, the hypnotist left the Philippines with his family for Los Angeles, where he gained employment as a proofreader for the Herald Examiner newspaper and contemplated writing a book about the Castillo case. He brought along most of the transcripts, although the tapes themselves stayed behind with Filipino intelligence. Early in 1968, Arcega's brother sent him a clipping from the Manila Times. It contained only one paragraph: Luis Castillo had been deported back to the United States.

Castillo returned to America and bounced around the criminal justice system during the next few years, doing time for attempted robbery in 1971. Russell was never able to locate him and he seems to have receded into the mists of history. However, Russell was able to prove that Castillo served time in a reformatory in Bordentown, New Jersey—the same reformatory that the government later admitted had supplied inmates to some of their earliest MK ULTRA experiments in hallucinogenics and hypnotism.

Much like Castillo, Lee Harvey Oswald just happened to be present at a military base where the same type of MK ULTRA experiments were being performed.